/*
 * MIT License
 *
 * Copyright (c) 2023 北京凯特伟业科技有限公司
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.je.bpm.engine.impl.persistence.entity.data.impl;

import com.je.bpm.engine.impl.TaskQueryImpl;
import com.je.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl;
import com.je.bpm.engine.impl.persistence.CachedEntityMatcher;
import com.je.bpm.engine.impl.persistence.entity.TaskEntity;
import com.je.bpm.engine.impl.persistence.entity.TaskEntityImpl;
import com.je.bpm.engine.impl.persistence.entity.data.AbstractDataManager;
import com.je.bpm.engine.impl.persistence.entity.data.TaskDataManager;
import com.je.bpm.engine.impl.persistence.entity.data.impl.cachematcher.TasksByExecutionIdMatcher;
import com.je.bpm.engine.task.Task;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static java.util.Collections.emptyList;


public class MybatisTaskDataManager extends AbstractDataManager<TaskEntity> implements TaskDataManager {

    protected CachedEntityMatcher<TaskEntity> tasksByExecutionIdMatcher = new TasksByExecutionIdMatcher();

    public MybatisTaskDataManager(ProcessEngineConfigurationImpl processEngineConfiguration) {
        super(processEngineConfiguration);
    }

    @Override
    public Class<? extends TaskEntity> getManagedEntityClass() {
        return TaskEntityImpl.class;
    }

    @Override
    public TaskEntity create() {
        return new TaskEntityImpl();
    }

    @Override
    public List<TaskEntity> findTasksByExecutionId(final String executionId) {
        return getList("selectTasksByExecutionId", executionId, tasksByExecutionIdMatcher, true);
    }

    @Override
    @SuppressWarnings("unchecked")
    public List<TaskEntity> findTasksByProcessInstanceId(String processInstanceId) {
        return getDbSqlSession().selectList("selectTasksByProcessInstanceId", processInstanceId);
    }

    @Override
    @SuppressWarnings("unchecked")
    public List<Task> findTasksByQueryCriteria(TaskQueryImpl taskQuery) {
        final String query = "selectTaskByQueryCriteria";
        return getDbSqlSession().selectList(query, taskQuery);
    }

    @Override
    @SuppressWarnings("unchecked")
    public List<Task> findTasksAndVariablesByQueryCriteria(TaskQueryImpl taskQuery) {
        final String query = "selectTaskWithVariablesByQueryCriteria";
        // paging doesn't work for combining task instances and variables due to
        // an outer join, so doing it in-memory
        if (taskQuery.getFirstResult() < 0 || taskQuery.getMaxResults() <= 0) {
            return emptyList();
        }

        int firstResult = taskQuery.getFirstResult();
        int maxResults = taskQuery.getMaxResults();

        // setting max results, limit to 20000 results for performance reasons
        if (taskQuery.getTaskVariablesLimit() != null) {
            taskQuery.setMaxResults(taskQuery.getTaskVariablesLimit());
        } else {
            taskQuery.setMaxResults(getProcessEngineConfiguration().getTaskQueryLimit());
        }
        taskQuery.setFirstResult(0);

        List<Task> instanceList = getDbSqlSession().selectListWithRawParameterWithoutFilter(query, taskQuery, taskQuery.getFirstResult(), taskQuery.getMaxResults());

        if (instanceList != null && !instanceList.isEmpty()) {
            if (firstResult > 0) {
                if (firstResult <= instanceList.size()) {
                    int toIndex = firstResult + Math.min(maxResults, instanceList.size() - firstResult);
                    return instanceList.subList(firstResult, toIndex);
                } else {
                    return emptyList();
                }
            } else {
                int toIndex = Math.min(maxResults, instanceList.size());
                return instanceList.subList(0, toIndex);
            }
        }
        return emptyList();
    }

    @Override
    public long findTaskCountByQueryCriteria(TaskQueryImpl taskQuery) {
        return (Long) getDbSqlSession().selectOne("selectTaskCountByQueryCriteria", taskQuery);
    }

    @Override
    @SuppressWarnings("unchecked")
    public List<Task> findTasksByNativeQuery(Map<String, Object> parameterMap, int firstResult, int maxResults) {
        return getDbSqlSession().selectListWithRawParameter("selectTaskByNativeQuery", parameterMap, firstResult, maxResults);
    }

    @Override
    public long findTaskCountByNativeQuery(Map<String, Object> parameterMap) {
        return (Long) getDbSqlSession().selectOne("selectTaskCountByNativeQuery", parameterMap);
    }

    @Override
    @SuppressWarnings("unchecked")
    public List<Task> findTasksByParentTaskId(String parentTaskId) {
        return getDbSqlSession().selectList("selectTasksByParentTaskId", parentTaskId);
    }

    @Override
    public void updateTaskTenantIdForDeployment(String deploymentId, String newTenantId) {
        HashMap<String, Object> params = new HashMap<String, Object>();
        params.put("deploymentId", deploymentId);
        params.put("tenantId", newTenantId);
        getDbSqlSession().update("updateTaskTenantIdForDeployment", params);
    }

}
